Its not being triggered, there is a purple wire in the harness that senses reverse, make sure this is properly connected either to the backup lights, or if you had to buy a can bus adapter like I did it will have a lead for reverse sensing. After making sure its wired go in settings and reverse camera polarity should be set to battery if you spliced into something hot like a light, or ground if you spliced into something that grounds on reverse. I just wrestled with mine yesterday, and now understand it pretty well, if you need more help tell me more account your harness setup and we'll go fro